PHP 2 arrays - merge values existing in both arrays to one array

Question

I have 2 arrays:

$array1 = array(1,2,3,4,5);
$array2 = array(3,4,5,6,7);

Is there any PHP function that does this?

$finalArray = unknown_php_function($array1,$array2);
// result: $finalArray = array(3,4,5);

It merges both arrays and removes values which aren't present in both arrays. Do I have to build a foreach cycle or is there an easier way? Thanks

cambraca · Accepted Answer · 2012-05-14 22:06:12Z

10

You want array_intersect for this, basically the intersection of two sets (arrays, in this case), just like in school. :-)

answered May 14, 2012 at 22:06

cambraca

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2 Comments

simPod Over a year ago

Thanks, that's exactly what I want. It's probably easily googlable but I didn't know the English expression intersection, teachers in my school teach in different language brb...

Daan Over a year ago

Yeah, that happens even if you're a native speaker of English :) This is a handy list of array functions in PHP: nl3.php.net/manual/en/ref.array.php

Asaph · Accepted Answer · 2012-05-14 22:09:04Z

3

You're looking for array_intersect(). Here is a demo:

$array1 = array(1,2,3,4,5);
$array2 = array(3,4,5,6,7);

$finalArray = array_intersect($array1,$array2);
print_r($finalArray);

Outputs:

Array
(
    [2] => 3
    [3] => 4
    [4] => 5
)

answered May 14, 2012 at 22:09

Asaph

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